2) Area of a circular sector = πR².(Ф/360°) Area of right triangle AOB = AO.AB/2 = 8x8/2 = 64/2 = 32 (Needed later) Area ACBO = π.8².(90°/360°) = 64.π.1/4 = 16π, BUT WE NEED the area limited between the arc and the chord: Area bounded by cord and arc)=Area sector (ACB0) - Area right triangle AOB Area bounded by cord and arc= 16π- 64/2.